Bump all packages that depend on curses.bui* or terminfo.bui* since they
might incur ncurses dependencies on some platforms, and ncurses just bumped
its shlib.
Some packages were bumped twice now, sorry for that.

Mechanically replaced man/* with ${PKGMANDIR}/* in the definition of
INSTALLATION_DIRS, as well as all occurrences of ${PREFIX}/man with
${PREFIX}/${PKGMANDIR}.
Fixes PR 35265, although I did not use the patch provided therein.

Libtool fix for PR pkg/26633, and other issues. Update libtool to 1.5.10
in the process. (More information on tech-pkg.)
Bump PKGREVISION and BUILDLINK_DEPENDS of all packages using libtool and
installing .la files.
Bump PKGREVISION (only) of all packages depending directly on the above
via a buildlink3 include.

Remove the old deprecated DEPENDS definition from bsd.pkg.mk.
Implement a new DEPENDS definition, which looks for an installed
package, building it if not present, and use it in preference to
LIB_DEPENDS. This should make the package collection more useful on
NetBSD ELF ports.